svg_transform_t
svg_text_draw(svg_document_t doc, svg_text_t text, svg_transform_t tf,
double x2, double y2, svg_transform_t tf)
svg_transform_print(svg_transform_t tf, char *buf, size_t len)
int svg_text_draw(svg_document_t, svg_text_t, svg_transform_t,
svg_transform_t);